> For the complete documentation index, see [llms.txt](https://roqqu-api-services.gitbook.io/ras/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://roqqu-api-services.gitbook.io/ras/trade/fee.md).

# Fee

Fees are taken from the token used in the operation — not from a separate USDT balance.

| Operation | Fee is taken from                |
| --------- | -------------------------------- |
| Buy       | USDT                             |
| Sell      | The token you sell               |
| Swap      | The token you swap from (`from`) |
| Send      | The token you send               |

To check a fee amount:

```
curl -X GET "https://service.roqqu.com/v1/transaction/fee?token=btc&amount=0.01" \
  -H "x-api-key: YOUR_API_KEY"
```

See [**Get Transaction Fee**](/ras/transaction/get-transaction-fees.md) for details.